/* =====================================================================
   TC-PRINCE2 7 — premium UI
   Design language adapted from the getdesign.md "Stripe" analysis:
   indigo brand, navy ink, Inter type, hairline borders, layered depth.
   All class names preserved (app.js / index.html unchanged).
   ===================================================================== */
:root{
  /* header */
  --navy:#0e1b3d; --navy-2:#1b2b57;
  /* brand (Foundation) */
  --accent:#635bff; --accent-press:#5048e5; --accent-2:#0f9d72;
  --primary-soft:rgba(99,91,255,.10);
  /* surfaces & text */
  --bg:#f5f7fc; --card:#ffffff; --ink:#0d253d; --ink-2:#33405c; --muted:#64748d;
  --line:#e6e9f2;
  /* status */
  --good:#0f9d72; --bad:#e5484d; --warn:#d98a00;
  /* depth & shape */
  --shadow-sm:0 1px 2px rgba(13,37,61,.05);
  --shadow:0 1px 2px rgba(13,37,61,.04),0 12px 30px rgba(13,37,61,.07);
  --shadow-lg:0 24px 56px rgba(13,37,61,.18);
  --radius:16px; --radius-sm:10px;
  --font:'Inter',-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:var(--font);background:var(--bg);color:var(--ink);line-height:1.6;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;letter-spacing:-.003em}
h1,h2,h3,h4{line-height:1.22;margin:.2em 0 .5em;letter-spacing:-.018em;font-weight:700}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.reg{font-size:.6em;vertical-align:super}
::selection{background:var(--primary-soft)}

/* Topbar */
.topbar{position:sticky;top:0;z-index:30;background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;padding:.8rem 1.25rem;display:flex;flex-wrap:wrap;gap:.85rem;align-items:center;justify-content:space-between;border-bottom:1px solid rgba(255,255,255,.06)}
.brand{display:flex;align-items:center;gap:.75rem}
.logo{display:grid;place-items:center;width:44px;height:44px;border-radius:13px;background:linear-gradient(140deg,var(--accent),#8b7bff);color:#fff;font-weight:800;letter-spacing:.5px;box-shadow:0 4px 14px rgba(99,91,255,.45)}
.brand h1{font-size:1.08rem;margin:0;color:#fff;letter-spacing:-.02em}
.brand .sub{margin:0;font-size:.78rem;color:#aebbd6}
.tabs{display:flex;gap:.2rem;background:rgba(255,255,255,.07);padding:.28rem;border-radius:13px;border:1px solid rgba(255,255,255,.06)}
.tabs button{border:0;background:transparent;color:#cdd8ee;padding:.5rem .9rem;border-radius:9px;font-size:.9rem;cursor:pointer;font-weight:600;font-family:inherit;transition:.18s}
.tabs button:hover{background:rgba(255,255,255,.1);color:#fff}
.tabs button.active{background:#fff;color:var(--navy);box-shadow:0 1px 3px rgba(0,0,0,.18)}

/* Track switch (Foundation / Practitioner) */
.track-switch{display:flex;gap:.2rem;background:rgba(0,0,0,.22);padding:.28rem;border-radius:13px;border:1px solid rgba(255,255,255,.08)}
.track-switch button{border:0;background:transparent;color:#cdd8ee;padding:.5rem .95rem;border-radius:9px;font-size:.85rem;font-weight:700;cursor:pointer;letter-spacing:.2px;font-family:inherit;transition:.18s}
.track-switch button:hover{background:rgba(255,255,255,.08);color:#fff}
.track-switch button.active{background:linear-gradient(140deg,var(--accent),#7a70ff);color:#fff;box-shadow:0 3px 10px rgba(99,91,255,.5)}
.track-badge{display:inline-block;background:var(--primary-soft);color:var(--accent);font-size:.7rem;font-weight:800;letter-spacing:.7px;text-transform:uppercase;padding:.3rem .75rem;border-radius:30px;margin-bottom:.7rem}

/* Practitioner theme accent (violet) */
body[data-track="practitioner"]{--accent:#7c5cff;--accent-press:#6b46e5;--primary-soft:rgba(124,92,255,.12)}

/* Layout */
main{max-width:1080px;margin:0 auto;padding:1.6rem 1.1rem 4rem}
.view{display:none;animation:fade .3s ease}
.view.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.4rem 1.5rem;box-shadow:var(--shadow);margin-bottom:1.2rem}
.muted{color:var(--muted);font-size:.9rem}

/* Buttons */
.btn{border:1px solid var(--line);background:#fff;color:var(--ink);padding:.6rem 1.15rem;border-radius:var(--radius-sm);font-size:.92rem;font-weight:600;cursor:pointer;font-family:inherit;transition:transform .16s,box-shadow .16s,background .16s,border-color .16s;box-shadow:var(--shadow-sm)}
.btn:hover{border-color:#cfd6e6;box-shadow:var(--shadow);transform:translateY(-1px)}
.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff;box-shadow:0 4px 14px rgba(99,91,255,.35)}
.btn.primary:hover{background:var(--accent-press);border-color:var(--accent-press);color:#fff}
.btn.small{padding:.4rem .8rem;font-size:.84rem}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none;box-shadow:none}
.btn:focus-visible{outline:3px solid var(--primary-soft);outline-offset:1px}
.tabs button:focus-visible,.track-switch button:focus-visible,.theme-toggle:focus-visible{outline:2px solid #fff;outline-offset:2px}
.opt:focus-visible,.nav-cell:focus-visible{outline:3px solid var(--primary-soft);outline-offset:1px}

/* Home */
.hero{position:relative;overflow:hidden;background:linear-gradient(120deg,#eef0ff 0%,#f3eefe 45%,#eafaf4 100%);border:1px solid var(--line);border-radius:var(--radius);padding:2.2rem 2rem;margin-bottom:1.2rem}
.hero h2{font-size:2rem;color:var(--ink);letter-spacing:-.03em;font-weight:800;max-width:20ch}
.hero p{max-width:62ch;color:var(--ink-2);font-size:1.05rem;margin:.4rem 0 0}
.cta-row{display:flex;gap:.7rem;flex-wrap:wrap;margin-top:1.3rem}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-bottom:1.2rem}
.stat{display:flex;flex-direction:column;align-items:center;text-align:center;gap:.25rem}
.stat .big{font-size:2.4rem;font-weight:800;color:var(--accent);letter-spacing:-.03em}
.stat span:last-child{color:var(--muted);font-size:.88rem}
.frame{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem;margin:.6rem 0}
.frame-col h4{color:var(--ink);font-weight:700;border-bottom:2px solid var(--accent);padding-bottom:.35rem;letter-spacing:-.01em}
.frame-col ol{margin:.6rem 0;padding-left:1.2rem;font-size:.9rem;color:var(--ink-2)}
.frame-col li{margin:.25rem 0}

/* Study guide */
.guide-layout{display:grid;grid-template-columns:250px 1fr;gap:1.3rem;align-items:start}
.toc{position:sticky;top:84px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:.7rem;box-shadow:var(--shadow);max-height:calc(100vh - 110px);overflow:auto}
.toc a{display:block;padding:.45rem .6rem;border-radius:9px;color:var(--ink-2);text-decoration:none;font-size:.86rem;font-weight:500;transition:.15s}
.toc a:hover{background:var(--bg);color:var(--ink)}
.toc a.active{background:var(--primary-soft);color:var(--accent);font-weight:700}
.guide-content{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.6rem 1.8rem;box-shadow:var(--shadow)}
.guide-section{scroll-margin-top:84px;padding-bottom:1.3rem;margin-bottom:1.3rem;border-bottom:1px solid var(--line)}
.guide-section:last-child{border-bottom:0}
.guide-section h2{color:var(--ink);font-size:1.4rem;letter-spacing:-.02em}
.guide-content h3{color:var(--ink);font-size:1.08rem;margin-top:1.2rem;letter-spacing:-.01em}
.guide-content table{width:100%;border-collapse:collapse;margin:.8rem 0;font-size:.88rem}
.guide-content th,.guide-content td{border:1px solid var(--line);padding:.55rem .65rem;text-align:left;vertical-align:top}
.guide-content th{background:#f4f6fc;color:var(--ink);font-weight:700}
.guide-content tr:nth-child(even) td{background:#fafbfe}
.guide-content .def{background:var(--primary-soft);border-left:3px solid var(--accent);padding:.7rem .9rem;border-radius:10px;margin:.7rem 0}
.guide-content .tip{background:rgba(15,157,114,.08);border-left:3px solid var(--accent-2);padding:.7rem .9rem;border-radius:10px;margin:.8rem 0;font-size:.9rem}
.guide-content ul,.guide-content ol{padding-left:1.3rem}
.guide-content li{margin:.28rem 0}

/* Flashcards */
.controls{display:flex;gap:.8rem;align-items:center;flex-wrap:wrap;margin-bottom:1.1rem}
.controls.center{justify-content:center}
.controls label{font-size:.82rem;color:var(--muted);display:flex;flex-direction:column;gap:.25rem;font-weight:600}
.controls.center label{flex-direction:row;align-items:center}
select{padding:.5rem .65rem;border:1px solid var(--line);border-radius:10px;font-size:.92rem;background:#fff;color:var(--ink);font-family:inherit;transition:.15s}
select:focus{outline:0;border-color:var(--accent);box-shadow:0 0 0 3px var(--primary-soft)}
.check{flex-direction:row!important;align-items:center;gap:.4rem!important}
.counter{font-size:.86rem;color:var(--muted);font-weight:600}
.flashcard{perspective:1400px;max-width:640px;margin:0 auto 1rem;cursor:pointer}
.flash-inner{position:relative;width:100%;min-height:260px;transition:transform .55s cubic-bezier(.4,.2,.2,1);transform-style:preserve-3d}
.flash-inner.flipped{transform:rotateY(180deg)}
.flash-face{position:absolute;inset:0;backface-visibility:hidden;border-radius:var(--radius);padding:1.8rem;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;box-shadow:var(--shadow);border:1px solid var(--line)}
.flash-front{background:#fff}
.flash-back{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;transform:rotateY(180deg);border-color:transparent}
.flash-face p{font-size:1.15rem;font-weight:600;margin:.4rem 0;letter-spacing:-.01em}
.flash-back p{font-weight:500;line-height:1.55}
.flash-cat{display:inline-block;background:var(--primary-soft);color:var(--accent);font-size:.7rem;font-weight:800;padding:.22rem .65rem;border-radius:20px;text-transform:uppercase;letter-spacing:.5px}
.flip-hint{position:absolute;bottom:.9rem;font-size:.72rem;opacity:.55}

/* Quiz */
.quiz-head{display:flex;align-items:center;gap:1rem;margin-bottom:.9rem}
.bar{flex:1;height:8px;background:#e7ebf5;border-radius:20px;overflow:hidden}
.bar-fill{height:100%;width:0;background:linear-gradient(90deg,var(--accent),#8b7bff);transition:width .35s ease}
.quiz-q .q-text{font-size:1.15rem;font-weight:600;margin-bottom:1.1rem;letter-spacing:-.01em}
.options{display:flex;flex-direction:column;gap:.6rem}
.opt{text-align:left;border:1px solid var(--line);background:#fff;padding:.8rem 1rem;border-radius:12px;cursor:pointer;font-size:.95rem;transition:.15s;display:flex;gap:.7rem;align-items:flex-start}
.opt:hover{border-color:var(--accent);box-shadow:0 0 0 3px var(--primary-soft)}
.opt .key{font-weight:800;color:var(--accent)}
.opt.correct{border-color:var(--good);background:rgba(15,157,114,.08)}
.opt.correct .key{color:var(--good)}
.opt.wrong{border-color:var(--bad);background:rgba(229,72,77,.07)}
.opt.wrong .key{color:var(--bad)}
.opt.disabled{cursor:default;pointer-events:none}
.explain{margin-top:.9rem;background:#f5f7fc;border-left:3px solid var(--accent);padding:.7rem .9rem;border-radius:10px;font-size:.9rem;color:var(--ink-2)}
.result-head{text-align:center}
.result-head .score{font-size:2.6rem;font-weight:800;margin:.3rem 0;letter-spacing:-.03em}
.score.pass{color:var(--good)} .score.fail{color:var(--bad)}
.review-item{margin-bottom:.7rem}
.review-item .q-text{font-weight:600}
.badge{font-size:.72rem;font-weight:700;padding:.16rem .5rem;border-radius:20px;margin-left:.4rem}
.badge.ok{background:rgba(15,157,114,.12);color:var(--good)} .badge.no{background:rgba(229,72,77,.12);color:var(--bad)}

.hidden{display:none!important}
.foot{max-width:1080px;margin:0 auto;padding:1.4rem 1.1rem 2.4rem;color:var(--muted);font-size:.78rem;text-align:center;line-height:1.7}
.foot-brand{display:inline-block;margin:.6rem 0 .2rem;opacity:.75;transition:opacity .18s}
.foot-brand:hover{opacity:1}
.foot-brand img{height:34px;width:auto;display:block}
.foot-brand .logo-dark{display:none}
[data-theme="dark"] .foot-brand .logo-light{display:none}
[data-theme="dark"] .foot-brand .logo-dark{display:block}

@media(max-width:820px){
  .grid-3,.frame{grid-template-columns:1fr}
  .guide-layout{grid-template-columns:1fr}
  .toc{position:static;max-height:none;display:flex;flex-wrap:wrap;gap:.2rem}
  .toc a{font-size:.8rem;padding:.3rem .5rem}
  .brand h1{font-size:.98rem}
  .hero{padding:1.6rem 1.3rem}
  .hero h2{font-size:1.6rem}
}

/* ===================== dashboard, mock, glossary ===================== */

/* Question category label */
.q-cat{display:inline-block;font-size:.7rem;font-weight:800;letter-spacing:.5px;text-transform:uppercase;color:var(--accent);background:var(--primary-soft);padding:.2rem .6rem;border-radius:20px;margin:0 0 .7rem}

/* Flashcard "known" button */
.btn.ok-btn.is-known{background:var(--good);border-color:var(--good);color:#fff;box-shadow:0 4px 14px rgba(15,157,114,.3)}
/* Flashcard "favourite" button */
.btn.fav-btn.is-fav{background:#d97706;border-color:#d97706;color:#fff;box-shadow:0 4px 14px rgba(217,119,6,.3)}
.opt.chosen{border-color:var(--accent);background:var(--primary-soft)}
.opt.chosen .key{color:var(--accent)}

/* Home dashboard */
.dash-head{display:flex;justify-content:space-between;align-items:center;gap:1rem}
.dash-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:.8rem;margin:.7rem 0 1.1rem}
.dash-tile{background:linear-gradient(160deg,#fbfcff,#f4f6fc);border:1px solid var(--line);border-radius:14px;padding:1rem .8rem;text-align:center;display:flex;flex-direction:column;gap:.2rem}
.dash-big{font-size:1.8rem;font-weight:800;color:var(--accent);letter-spacing:-.02em}
.dash-tile span:last-child{font-size:.76rem;color:var(--muted)}
.verdict{font-weight:600;padding:.7rem .9rem;border-radius:12px;background:var(--primary-soft);border-left:3px solid var(--accent);color:var(--ink-2)}
.verdict.pass{background:rgba(15,157,114,.1);border-color:var(--good);color:#0c6b4f}
.verdict.fail{background:rgba(217,138,0,.1);border-color:var(--warn);color:#8a5a13}
.verdict.ok{background:var(--primary-soft);border-color:var(--accent)}
.weak-wrap{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem;margin:.9rem 0}
.weak-wrap h4{margin:.2rem 0;color:var(--ink);letter-spacing:-.01em}
.weak-list{list-style:none;margin:0;padding:0}
.weak-list li{display:flex;align-items:center;gap:.5rem;padding:.4rem .1rem;border-bottom:1px solid var(--line);font-size:.9rem}
.weak-list li span{flex:1}
.weak-list li b{font-weight:800}
.weak-list li b.ok{color:var(--good)} .weak-list li b.no{color:var(--bad)}
.weak-list li small{color:var(--muted);width:42px;text-align:right}

/* Mock exam intro rules */
.exam-rules{display:grid;grid-template-columns:repeat(4,1fr);gap:.8rem;margin:1.1rem 0}
.exam-rules .rule{background:linear-gradient(160deg,#fbfcff,#f4f6fc);border:1px solid var(--line);border-radius:14px;padding:.9rem;text-align:center;display:flex;flex-direction:column;gap:.2rem}
.exam-rules .rule b{font-size:1.6rem;font-weight:800;color:var(--accent);letter-spacing:-.02em}
.exam-rules .rule span{font-size:.76rem;color:var(--muted)}

/* Mock exam run */
.mock-bar{position:sticky;top:70px;z-index:20;display:flex;align-items:center;gap:1rem;flex-wrap:wrap;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:.7rem 1rem;box-shadow:var(--shadow);margin-bottom:1.1rem}
.mock-bar .counter{font-weight:700}
.timer{font-variant-numeric:tabular-nums;font-weight:800;font-size:1.15rem;color:var(--ink);background:var(--primary-soft);padding:.28rem .75rem;border-radius:10px}
.timer.low{color:#fff;background:var(--bad);animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.55}}
.mock-bar .answered{color:var(--muted);font-size:.85rem;margin-left:auto}
.mock-layout{display:grid;grid-template-columns:1fr 230px;gap:1.2rem;align-items:start}
.mock-q .controls{margin-top:1.1rem;margin-bottom:0}
.flag-btn.on{background:var(--warn);border-color:var(--warn);color:#fff}
.navigator{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:.9rem;box-shadow:var(--shadow);position:sticky;top:136px}
.navigator h4{margin:.1rem 0 .6rem;color:var(--ink);letter-spacing:-.01em}
.nav-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:.35rem}
.nav-cell{border:1px solid var(--line);background:#fff;border-radius:8px;padding:.4rem 0;font-size:.78rem;font-weight:700;cursor:pointer;color:var(--muted);transition:.14s}
.nav-cell:hover{border-color:var(--accent);color:var(--accent)}
.nav-cell.answered{background:var(--primary-soft);color:var(--accent);border-color:transparent}
.nav-cell.flagged{background:rgba(217,138,0,.14);border-color:var(--warn);color:#8a5a13}
.nav-cell.current{outline:2px solid var(--accent);outline-offset:0}
.nav-legend{display:flex;flex-wrap:wrap;gap:.5rem 1rem;margin-top:.8rem;font-size:.72rem;color:var(--muted)}
.nav-legend .dot{display:inline-block;width:10px;height:10px;border-radius:3px;margin-right:.25rem;vertical-align:middle;border:1px solid var(--line)}
.dot.answered{background:var(--primary-soft);border-color:transparent}
.dot.flagged{background:rgba(217,138,0,.14);border-color:var(--warn)}
.dot.current{background:#fff;outline:2px solid var(--accent)}

/* Mock breakdown table */
table.bd{width:100%;border-collapse:collapse;font-size:.9rem;margin-top:.5rem}
table.bd th,table.bd td{border:1px solid var(--line);padding:.5rem .65rem;text-align:left}
table.bd th{background:#f4f6fc;color:var(--ink);font-weight:700}
table.bd td.ok{color:var(--good);font-weight:700}
table.bd td.no{color:var(--bad);font-weight:700}

/* Glossary */
input[type=search]{flex:1;min-width:220px;padding:.55rem .8rem;border:1px solid var(--line);border-radius:10px;font-size:.95rem;font-family:inherit;background:#fff;color:var(--ink);transition:.15s}
input[type=search]:focus{outline:0;border-color:var(--accent);box-shadow:0 0 0 3px var(--primary-soft)}
.gloss-card{padding:0}
.gloss-item{padding:.85rem 1.2rem;border-bottom:1px solid var(--line)}
.gloss-item:last-child{border-bottom:0}
.gloss-term{font-weight:700;color:var(--ink);letter-spacing:-.01em}
.gloss-group{font-size:.66rem;font-weight:800;text-transform:uppercase;letter-spacing:.5px;color:var(--accent);background:var(--primary-soft);padding:.13rem .5rem;border-radius:20px;margin-left:.4rem}
.gloss-def{color:var(--ink-2);font-size:.92rem;margin-top:.25rem}

@media(max-width:820px){
  .dash-grid{grid-template-columns:repeat(2,1fr)}
  .exam-rules{grid-template-columns:repeat(2,1fr)}
  .weak-wrap{grid-template-columns:1fr}
  .mock-layout{grid-template-columns:1fr}
  .navigator{position:static}
  .nav-grid{grid-template-columns:repeat(10,1fr)}
  .mock-bar{top:0}
}

/* ===================== Reward loop (streaks + celebrations) ===================== */
.streak{font-size:.86rem;font-weight:800;color:#d97706;white-space:nowrap;min-width:0}
.streak.bump{animation:streakBump .45s cubic-bezier(.3,1.5,.5,1)}
@keyframes streakBump{40%{transform:scale(1.35)}}
.opt.correct{animation:optPop .35s cubic-bezier(.3,1.4,.5,1)}
@keyframes optPop{45%{transform:scale(1.015)}}
.confetti-p{position:fixed;width:9px;height:9px;border-radius:2px;pointer-events:none;z-index:999;animation:confettiFly .85s cubic-bezier(.15,.6,.4,1) forwards}
@keyframes confettiFly{to{transform:translate(var(--dx),var(--dy)) rotate(560deg);opacity:0}}
@media (prefers-reduced-motion: reduce){.confetti-p{display:none}.opt.correct{animation:none}.streak.bump{animation:none}}

/* ===================== Visual lessons ===================== */
.lesson-visual{margin:1rem 0 1.4rem;border-radius:14px;overflow:hidden;border:1px solid var(--line);background:#0b1120;box-shadow:var(--shadow)}
.lesson-visual img{display:block;width:100%;height:auto}
.lesson-visual figcaption{padding:.7rem 1rem;font-size:.88rem;line-height:1.55;color:#aeb9d0;background:#0e1526;border-top:1px solid rgba(255,255,255,.06)}
.lesson-visual figcaption::before{content:"Remember it: ";font-weight:700;color:#8b8bff}

/* ===================== Theme toggle (topbar) ===================== */
.theme-toggle{border:1px solid rgba(255,255,255,.12);background:rgba(255,255,255,.07);color:#cdd8ee;width:38px;height:38px;border-radius:11px;cursor:pointer;font-size:1rem;line-height:1;display:grid;place-items:center;transition:.18s;font-family:inherit}
.theme-toggle:hover{background:rgba(255,255,255,.16);color:#fff}

/* ===================== Dark mode ===================== */
[data-theme="dark"]{
  --navy:#0a0f1f; --navy-2:#141d39;
  --bg:#0b1120; --card:#141c2f; --ink:#e7ecf6; --ink-2:#aeb9d0; --muted:#8493ac;
  --line:#27314e; --accent:#8b8bff; --accent-press:#7a78f5; --primary-soft:rgba(139,139,255,.16);
  --shadow-sm:0 1px 2px rgba(0,0,0,.35);
  --shadow:0 1px 2px rgba(0,0,0,.35),0 14px 34px rgba(0,0,0,.5);
  --shadow-lg:0 28px 64px rgba(0,0,0,.6);
}
[data-theme="dark"] body{background:var(--bg);color:var(--ink)}
[data-theme="dark"] body[data-track="practitioner"]{--accent:#a08cff;--accent-press:#8d72f0;--primary-soft:rgba(160,140,255,.18)}
/* surfaces that were hardcoded light */
[data-theme="dark"] .btn{background:var(--card);color:var(--ink);border-color:var(--line)}
[data-theme="dark"] .btn:hover{border-color:#3a456a}
[data-theme="dark"] .flash-front{background:var(--card)}
[data-theme="dark"] .opt{background:var(--card)}
[data-theme="dark"] select,[data-theme="dark"] input[type=search],[data-theme="dark"] input[type=email]{background:var(--card);color:var(--ink);border-color:var(--line)}
[data-theme="dark"] .nav-cell{background:var(--card)}
[data-theme="dark"] .guide-content th,[data-theme="dark"] table.bd th{background:#1a2440;color:var(--ink)}
[data-theme="dark"] .guide-content tr:nth-child(even) td{background:#10182b}
[data-theme="dark"] .explain{background:#10182b}
[data-theme="dark"] .bar{background:#27314e}
[data-theme="dark"] .hero{background:linear-gradient(120deg,#15203f 0%,#1b1738 50%,#0f2a22 100%)}
[data-theme="dark"] .dash-tile,[data-theme="dark"] .exam-rules .rule{background:linear-gradient(160deg,#161f3a,#121a2f)}
[data-theme="dark"] .opt.correct{background:rgba(15,157,114,.17)}
[data-theme="dark"] .opt.wrong{background:rgba(229,72,77,.17)}
[data-theme="dark"] .timer{color:var(--ink)}
[data-theme="dark"] .verdict.fail{color:#f0b860}
[data-theme="dark"] .weak-list li b.ok,[data-theme="dark"] table.bd td.ok{color:#3dd2a4}
/* auth pages: tame inline light hairlines */
[data-theme="dark"] #buy-block{border-top-color:var(--line)!important}
[data-theme="dark"] .login-card{border-color:var(--line)}